Two big things you should do on your next demo reel:
1. Make sure you add music and sound effects. If you add music, people will tell what type of character and scenario you are portraying a whole lot better. Make sure you don't go too overboard with sound effects, but you'll want to have a couple in there.
2. Come up with original scripting. Some of the stuff you said was pretty generic or from other media. If you come up with your own lines, it'll truly reflect the characters you are portraying and allow you to show your acting potential. You can also go balls-to-the-wall crazy with your scripting, but a few generic lines wouldn't hurt.
Go to this website here to get an idea of how a professional demo reel should sound, the structure of the clips to show they have range, the general length of the reel and how zany the writing is:
http://www.voicebank.net
Also, I felt you were trying to imitate Brad Swaille's laughter. Unless you're trying to do an impression, I don't recommend this. Your own laughter sounds a lot more genuine, and trying to imitate someone's laughter can be very hard, depending on who the person is.
You have a cracky voice like me. So if I have to give advice, perhaps focus more on lower pitches, and work on your higher range. Going with lower voices reduces the probability of your voice breaking, and if your voice does break, get a big glass of water and then do a take two, otherwise it be harder and harder to produce a smooth take.
Overall, the voices were pretty good. Maybe bring your voices from around 2:40 in closer at the beginning. You can also portray maniacal characters well, so that's probably your strong point. Keep working on the laughter, because trust me, I've been in your position, and you'll get there
But yeah, for a first attempt, not bad. Sorry if it sounds like I'm contradicting myself, but that's because I haven't played Phoenix Wright in a long time
